Safety device for envelope machines



A. NVICK.

SAFETY DEVICE FOR ENVELOPE MACHEN'ES.

AlPLlcATloN FILED sEPT.'6,1919.

2 SHEETS-SHEET l.

A. NVCK. I

SAFETY nEvlcE Foa ENVI-:LOPE MACHINES.

. APPLCATON FILED SEPT. 5.1919. i LSL A atnte 00E 3L 1922.

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ABRAHAM NOVICK, OF NEWT YORK, N. Y., ASSIGNOR TO L. SMITHE MACHENECOMPANY, INCORPORATED, OFNEVT YORK, N. Y., A CORPORATXON OF NEW YORK.

SAFETY DEVICE FOR ENVELOEE ll'ftACI-IENES.

T @ZZ wiz/0m 'it may concern:

Be it known that l, ABRAHAM Novroii, a citizen of the United States, anda resident of New York, borough of Manhattan, in the county ofA New Yorkand State of New York, have invented certain new and useful improvementsin Safety Devices for Envelope Machines, of which the following is aspecification. y

This invention relates to safety devices for envelo Je machines andpertains particularly to tiat class of envelope machines which includesa folding-bed or trap which retreats downwardly to discharge the foldedenvelope; such for instance as shown in my ll. S. Patent No. 1,298,775of April 1, 1919.

The object of my improvements is to provide a device of the classspeciiied in which the hand of the operator will be automaticallyprotected against injury when in the path of certain of the moving partsof the machine while removing the product.

`With this object in view my improvements comprise features illustratedin their preferred embodiment of the drawings accompanying thisspecification, wherein Figure 1 is an elevation, partly in section, ofso much of an envelope machine as will suffice to illustrate myimprovements. Fig. 2 is a top plan view corresponding with 1. Figs. 3and 4: are elevations similar to that of Fig. 1 but showing the severalparts in different relative positions. Fig. 5 is a partial. top planview corresponding with Fig. 4t. All the figures of the draw ing are toone scale.

Referring particularly to Figs. 1 and 2 of the drawings, movablefolding-bed or trap 3 .is rotatably mounted on rod et fixed instationary bed 2 of the machine, and is operated to and fro between aposition for folding t-he envelope and a position for discharging theenvelope, through the acticni of a pair of duplicate mechanisms, 50, 51,one at each end thereof, by a pair of cams, as 5, fixed to shaft 6,rotatably mounted below said trap.l As said duplicate mecha uisms arethe same throughout, a description of the details of one, 50, willsuffice for both. Arm T, pivo'ted at one end at 8, is provided. at theother end with T portion 9, the lower extension of which carries roll inengagement with the periphery of said cam 5 and the upper extension ofwhich is pivoted at 11 to thelower end, of

yieldable connection 12, the upper end of said connection beingpivotally connected at 13 to said trap 3.

Said yieldable connection comprises plunger 1/1- having a bearing at oneend for engagement with said pivot 13 and the other end slidably mountedin socket 15 and supported therein by compression spring 16, the reduced.lower portion 17 of said socket being threaded and extending throughboss 18 of adjustment member 19 for adJustable Fixed relation therewithby means of clamp nuts 20, 21, threaded on said portion 17 and tightenedagainst opposite faces respecn tively of said boss. Said adjustmentmember 19 is provided at its lower end with a bearing for engagementwith said pivot 11. Trap 3 has opposite lugs 22, 23, in which are fixedthe pivots, respectively, of said @yieldable connectionstas pivot 13 oflug 22 Jand vleldalole connection 12', and each provided with anoutwardly extending and downreaching stop member, as 24 to lug 22, forengagement with the top of the respective socket, as 15 of yieldableconnection 12.

Fired to the lower face of bed 2 and de pending therefrom are studs 25,26 having interposable arms 27, 28 pivotally mounted thereon',respectively, with their free endsv 29, 30 adapted for interposition atpredetermined times between the heads of the pivots of the upper ends ofsaid yieldable connections and the lower faces of stationary abut ments31, 32, respectively, of bed 2, as end 29 between pivot 13 and abutment31, Fig. 5.

Fixed on the outboard ends of studs 25, 26, respectively, are supports33, 3a in which is rotatably mounted shaft having gate 36 fixed theretofor normally closing the path of the hand of the operator to the workingface of trap Stop arms 37, 38 also fixed to said. shaft 35 are providedfor coaction with stop screws 39, (t0 of arms jf, 23, respectively, forholding said arms in their inoperative positions against the tension ofsprings L11, 4:2, each of said springs having one end fast to itsrespective arm. and the other end fast to one of pins 13, elet,respectively Xed in the lower face of bed 2. Stop arms 37, 38 areprovided with rearwardly eXtendin counterweights 45, 4:6, respectively,for holding said gate 36 in its normal position, said stop arms beingheld in operative positions against the action of said coiuiterweightsby projections al", 4S of said arms coactingl with. stop screws 259, L10of interposable arms 27, 26 respectively.

The operation of my improved. device is as follows: The several. partsbeing in the positions of Figs. 1 and 2, 'wherein trap 3 is rigidlysupported. in its position for folding the envelope by the coaction ofstops, as 24, against the uppei` ends-of the sockets, as 15, cams as 5continue their rotation until rolls as 10 drop from the high to the lowspots thereof, whereby trap 3 is lowered to its discharge position, whenthe hand of the operator may be thrust beneath bed 2,

over shaft 35 and forwardly over the working face of trap 3 until thefingers engage the folded envelope for removal, as shown in dottedoutline in Fig. 3. This action of the hand lowers gate 36 from theposition of F ig. 1 to that of -Fig. 3, thereby rocking stop arms 37, 38out of coaction with stop screws 39, 40, whereby interposable arms 27,28 are free to be drawn inwardly by the action of springs 41, 4t2 to thepositions of Figs. 3 and 5. If now the hand of the operatorfails to bewithdrawn before cams as 5 again rotate to their high spots, as in F ig.4L, stops, as 24, being out of engagement with the ends of the sockets,as 15, and arm ends 29, 30 being interposed, between the heads of thepivots of the yieldable connections and abutments 31, 32, respectively,as end 29 between pivot 13 and abutment 31, said trap `3 will thereby beheld in its discharge position against the thrust of cams, as 5,sockets, as 15, and plungers, as 1.4i-, being free to yield toward eachother against the resistance of compression springs, as 16 of yieldableconnection 12, thus protecting the hand of the operator against injuryby crushing. The hand of the operator being withdrawn and gate 36,interposable arms 27, 28 and stop arms 37, 38 being returned to theirnormal positions, trap 3 will be free to return to its folding positionupon the next rotation of cams, as 5, to their high spots.

I claim:

' 1. In a safety device the combination of a bed movable from operativeto inoperative position, means for n'ioving said bed, a yieldableconnection between said bed and its movingmeans, and means fixed to saidbed for normally rendering said yieldable connection non-yieldable.

2. In a safety device for envelope machines employing trap movable toand. fro between a. position. for folding the envelope and a positionfor discharging the envelope, means for thus moving said trap, ayieldable connection between said trap and said trap moving means, meansautomatically operative when released for causing said .connection toyield and for preventing said 'trap moving `'from its discharge positionto its folding position, means actuated by the insertion of the handonto the working face of said trap when in its discharge position forreleasing said trap movement preventing means, and means carried by saidtrap for automatically rendering said connection non-yieldable when saidtrap is in its :folding position.

In a safety device the combination of a bed movable from operative toinoper tive position, means for moving'said bed, a yieldable connectionbetween said bed and its moving means, a stationary abutment, and a`movable arm operable for interposition between said abutment and saidyieldable connection for preventing said yieldable connection fromactuating said bed. y

4t. In a safety device the combination of a bed movable from operativeto inoperative position, means for `moving said bed, a yieldableconnection between said bed and its moving means, an abutment, a movablearm operable when released for interposition between said abutment andsaid yieldable connection for preventing said yieldable connection fromactuating said bed, and means carried by said bed for rendering saidyieldable connection non-yieldable when said. movable arm is notreleased.

5. In a safety device lfor envelope machines employing a trap movable toand fro between an operative position where the envelope is foldedthereon and a discharge position for the folded envelope, means for thusmoving said trap including a yieldable connection, an abutment, apivoted arm automatically operative when released for interpositionbetween said .abutment and said yieldable connection for preventingysaid yieldable connection from actuating said trap, a gate normallyclosed and which when closed bars the entrance of the hand to the faceof said trap when said trap is in its discharge position, and meansactuated by said gate when moved lfrom its closed position for releasingsaid interposable means.

6. In a safety device for envelope inachines employing a hinged trap,means for swinging said trap on its hinge from an operative positionwhere the envelope is 4folded thereon. downwardly to a dischargeposition and back again comprising a yieldable connection, an abutment,a pivoted arm l,

automatically operative when. released for interposition between saidabutment and said yieldable connection for preventing said yieldableconnection from actuating said trap, and means carried by said traa forat predetermined times rendering sa-iii yieldable connectionnon-yieldable.

7.111 a safety device for envelope machines employing a vtrap movablefrom lan operative uposit-ion downwardly to a dsiso charge position andback again, a cam for thus moving said trap, a yieldable connectionbetween said trap and cam7 an abutment, a pivoted arm automaticallyoperative when released for interposition between said abutment and saidyieldable connection for preventing said yieldable connection fromactuating said trap7 and means xed to said trap and operable just priorto the end of the upward movement of said trap for transforming saidyieldable connection into a rigid connection.

8. In a safety device the combination of' a movable bed, yieldable meansfor moving said bed, and means fixed to said bed for rendering saidyieldable means non-yieldable.

9. In a safety device the combination of a movable bed, yieldable meansfor movingsaid bed, a stationary abutment, and means interposablebetween said abutment and said yieldable means for preventing themovement of said bed.

10. In a safety device the combination of a bed movable from operativeto inoperative position, yieldable means for moving said bed, and means`xed to said bed and brought into operative position as said bed movesinto operative position for rendering` said yieldable meansnon-yieldable.

In witness whereoi7 I hereby aix my signature this 29 day of August,1919.

ABRAHAM NOVICK.

